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DDC264

Texas Instruments
Part Number DDC264
Manufacturer Texas Instruments
Description Current-Input Analog-to-Digital Converter
Published Sep 21, 2019
Detailed Description Product Folder Sample & Buy Technical Documents Tools & Software Support & Community DDC264 SBAS368D – MAY 2006 – R...
Datasheet PDF File DDC264 PDF File

DDC264
DDC264

Overview
Product Folder Sample & Buy Technical Documents Tools & Software Support & Community DDC264 SBAS368D – MAY 2006 – REVISED DECEMBER 2016 DDC264 64-Channel, Current-Input Analog-to-Digital Converter 1 Features •1 Single-Chip Solution to Directly Measure 64 LowLevel Currents • Proven High-Precision, True Integrating Architecture With 100% Charge Collection • Easy Upgrade for Existing DDC Family Applications • Very Low Power: 3 mW/channel • Extremely Linear: INL = ±0.
025% of Reading ±1 ppm of FSR • Low Noise: 6.
3 ppm of FSR • Adjustable Full-Scale Range • Adjustable Speed – Data Rates up to 6 kSPS With 20-bit Performance – Integration Times as low as 160 µs • Daisy-Chainable Serial Interface • In-Package Bypass Capacitors Simplify PCB Design 2 Applications • CT Scanner DAS • Photodiode Sensors • X-Ray Detection Systems SPACER SPACER REF3040 OPA350 VREF Buffer Simplified Schematic IN1 IN64 AVDD DVDD VREF Configuration and Control Serial Interface DDC264 CLK CONV DIN_CFG CLK_CFG RESET To/From Controller DVALID DCLK DIN DOUT QGND AGND DGND Copyright © 2016, Texas Instruments Incorporated Protected by US Patent #5841310 3 Description The DDC264 is a 20-bit, 64-channel, current-input analog-to-digital (A/D) converter.
It combines both current-to-voltage and A/D conversion so that 64 separate low-level current output devices, such as photodiodes, can be directly connected to its inputs and digitized.
For each of the 64 inputs, the DDC264 uses the proven dual switched integrator front-end.
This configuration allows for continuous current integration: while one integrator is being digitized by the onboard A/D converter, the other is integrating the input current.
This architecture provides both a very stable offset and a loss-less collection of the input current.
Adjustable integration times range from 160 µs to 1 s, allowing currents from fAs to µAs to be continuously measured with outstanding precision.
The DDC264 has a serial interface designed for dai...


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